Finding the Third Proportional to 453,780 and 978,270

Step by Step Solution

1. Step 1: Write the proportion equation
   453,780 : 978,270 = 978,270 : x
2. Step 2: Convert to fraction form
   453,780/978,270 = 978,270/x
3. Step 3: Cross multiply
   453,780x = 978,270 × 978,270
4. Step 4: Simplify right side
   453,780x = 957,012,192,900
5. Step 5: Solve for x
   x = 957,012,192,900/453,780
6. Step 6: Final answer
   x = 2,108,978.34